#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
    unsigned int a = 0;
    scanf("%u", &a);
    int count = 0;
   for(int i=0;i<32;i++)
    {
       if (((a >> i) & 1) == 1)
           count++;
    }
   printf("%d", count);
  
}